/* ============================================================
   世界盒子 WorldBox — 宣传站样式
   设计语言：Glassmorphism 毛玻璃 + Minecraft 元素
   ============================================================ */

:root {
  --bg: #070d0a;
  --bg-2: #0b1410;
  --ink: #eef6f0;
  --ink-dim: #9fb4a8;
  --green: #3ddc84;
  --green-deep: #16a34a;
  --cyan: #67e8f9;
  --blue: #60a5fa;
  --purple: #c084fc;
  --orange: #fb923c;
  --pink: #f472b6;
  --glass: rgba(255, 255, 255, 0.055);
  --glass-strong: rgba(255, 255, 255, 0.09);
  --line: rgba(255, 255, 255, 0.12);
  --radius: 22px;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

.container { width: min(1180px, 92vw); margin: 0 auto; }

/* ---------- 通用玻璃面板 ---------- */
/* 注：卡片均位于纯色背景之上，backdrop-filter 模糊效果不可见但极为耗性能，故不启用 */
.glass {
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.grad {
  background: linear-gradient(100deg, var(--green) 0%, var(--cyan) 55%, var(--blue) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.5px;
  transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(120deg, var(--green) 0%, var(--green-deep) 100%);
  color: #04120a;
  box-shadow: 0 10px 30px rgba(61, 220, 132, 0.35);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(61, 220, 132, 0.5); }
.btn-ghost {
  background: var(--glass);
  border: 1px solid var(--line);
  color: var(--ink);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover { background: var(--glass-strong); transform: translateY(-3px); }
.btn-lg { padding: 16px 44px; font-size: 17px; }
.btn-full { width: 100%; }
.btn-qq {
  background: linear-gradient(120deg, #38bdf8 0%, #2563eb 100%);
  color: #fff;
  box-shadow: 0 10px 30px rgba(56, 189, 248, 0.3);
}
.btn-qq:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(56, 189, 248, 0.45); }
.btn-download {
  background: linear-gradient(120deg, #fbbf24 0%, #f97316 100%);
  color: #1a1005;
  box-shadow: 0 10px 30px rgba(251, 191, 36, 0.35);
}
.btn-download:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(251, 146, 60, 0.5); }
.btn-direct {
  background: linear-gradient(120deg, #c084fc 0%, #7c3aed 100%);
  color: #fff;
  box-shadow: 0 10px 30px rgba(192, 132, 252, 0.35);
}
.btn-direct:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(192, 132, 252, 0.5); }

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background 0.35s, box-shadow 0.35s, border-color 0.35s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(7, 13, 10, 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}
.nav-inner {
  width: min(1180px, 92vw);
  margin: 0 auto;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand { display: inline-flex; align-items: center; gap: 11px; }

/* 像素镐子 Logo */
.brand-logo {
  width: 34px;
  height: 34px;
  object-fit: contain;
  flex: none;
  filter: drop-shadow(0 4px 12px rgba(61, 220, 132, 0.35));
  transition: transform 0.3s;
}
.brand:hover .brand-logo { transform: rotate(-6deg) scale(1.1); }

.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 17px; letter-spacing: 1px; }
.brand-text small { font-size: 10.5px; color: var(--ink-dim); letter-spacing: 2.5px; text-transform: uppercase; }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 8px 15px;
  border-radius: 999px;
  font-size: 14.5px;
  color: var(--ink-dim);
  transition: color 0.25s, background 0.25s;
}
.nav-links a:hover { color: var(--ink); background: var(--glass); }
.nav-links a.nav-cta {
  color: #04120a;
  background: linear-gradient(120deg, var(--green), var(--green-deep));
  font-weight: 700;
  margin-left: 8px;
}
.nav-links a.nav-cta:hover { box-shadow: 0 8px 22px rgba(61, 220, 132, 0.4); }

.nav-burger { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.nav-burger span { width: 24px; height: 2px; background: var(--ink); border-radius: 2px; transition: 0.3s; }
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 130px 0 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background: url("../assets/shot-full.jpg") center / cover no-repeat;
  transform: scale(1.06);
  animation: heroZoom 14s ease-in-out infinite alternate;
}
@keyframes heroZoom { from { transform: scale(1.06); } to { transform: scale(1.14); } }
.hero-mask {
  position: absolute; inset: 0;
  background:
    radial-gradient(60% 50% at 20% 30%, rgba(7,13,10,0.55), rgba(7,13,10,0.9)),
    linear-gradient(180deg, rgba(7,13,10,0.82) 0%, rgba(7,13,10,0.62) 45%, var(--bg) 100%);
}
.hero::after {
  content: "";
  position: absolute; inset: auto 0 0 0; height: 180px;
  background: linear-gradient(180deg, transparent, var(--bg));
  pointer-events: none;
}

/* 漂浮方块装饰 */
.hero-blocks { position: absolute; inset: 0; pointer-events: none; }
.hb {
  position: absolute;
  width: 26px; height: 26px;
  border-radius: 6px;
  background: linear-gradient(160deg, rgba(61,220,132,.5), rgba(22,163,74,.25));
  border: 1px solid rgba(61,220,132,.4);
  will-change: transform;
  animation: hbFloat 7s ease-in-out infinite;
}
.hb-1 { top: 22%; left: 8%; animation-delay: 0s; }
.hb-2 { top: 30%; left: 46%; width: 18px; height: 18px; animation-delay: 1.4s; background: linear-gradient(160deg, rgba(103,232,249,.5), rgba(96,165,250,.25)); border-color: rgba(103,232,249,.4); }
.hb-3 { top: 62%; left: 5%; width: 34px; height: 34px; animation-delay: 2.6s; }
.hb-4 { top: 70%; left: 88%; animation-delay: 0.8s; background: linear-gradient(160deg, rgba(192,132,252,.45), rgba(147,51,234,.22)); border-color: rgba(192,132,252,.4); }
.hb-5 { top: 18%; left: 92%; width: 20px; height: 20px; animation-delay: 3.4s; }
.hb-6 { top: 46%; left: 96%; width: 14px; height: 14px; animation-delay: 4.6s; }
@keyframes hbFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-26px) rotate(14deg); }
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: min(1180px, 92vw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  font-size: 13.5px;
  color: var(--ink-dim);
  letter-spacing: 0.5px;
}
.hero-badge .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 0 rgba(61, 220, 132, 0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(61, 220, 132, 0.55); }
  70% { box-shadow: 0 0 0 10px rgba(61, 220, 132, 0); }
  100% { box-shadow: 0 0 0 0 rgba(61, 220, 132, 0); }
}

.hero-title { margin: 26px 0 6px; line-height: 1.08; }
.hero-title-line {
  display: block;
  font-size: clamp(52px, 7.2vw, 92px);
  font-weight: 900;
  letter-spacing: 4px;
  background: linear-gradient(100deg, #ffffff 10%, var(--green) 55%, var(--cyan) 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 6px 30px rgba(61, 220, 132, 0.25));
}
.hero-title-sub {
  display: block;
  margin-top: 10px;
  font-size: clamp(18px, 2.2vw, 26px);
  font-weight: 700;
  letter-spacing: 10px;
  color: var(--ink);
}
.hero-title-sub em { font-style: normal; color: var(--green); margin: 0 4px; }

.hero-slogan {
  font-size: clamp(17px, 2vw, 21px);
  color: var(--ink);
  margin: 18px 0 12px;
  font-weight: 600;
}
.hero-slogan strong { color: var(--green); }

.hero-desc {
  max-width: 520px;
  color: var(--ink-dim);
  font-size: 15.5px;
  margin-bottom: 32px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 44px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 14px;
  width: fit-content;
  padding: 18px 26px;
  border-radius: 18px;
  background: var(--glass);
  border: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.stat { text-align: center; padding: 0 12px; position: relative; }
.stat + .stat::before {
  content: ""; position: absolute; left: 0; top: 20%; height: 60%; width: 1px;
  background: var(--line);
}
.stat b {
  display: block;
  font-size: 26px;
  font-weight: 900;
  color: var(--green);
  letter-spacing: 1px;
}
.stat span { font-size: 12.5px; color: var(--ink-dim); }

/* 首屏 UI 演示 */
.hero-ui { perspective: 1200px; }
.ui-mock {
  position: relative;
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 12px;
  padding: 14px;
  border-radius: 24px;
  background: rgba(10, 18, 14, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), inset 0 1px 0 rgba(255,255,255,.12);
  transform: rotateY(-9deg) rotateX(3deg);
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
  animation: uiFloat 6s ease-in-out infinite;
  will-change: transform;
}
.ui-mock:hover { transform: rotateY(-3deg) rotateX(1deg) scale(1.02); }
@keyframes uiFloat {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -14px; }
}
.ui-rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 10px 0;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
}
.ui-rail-item {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 12px;
  color: var(--ink-dim);
  transition: 0.25s;
}
.ui-rail-item.active, .ui-rail-item:hover {
  color: #04120a;
  background: linear-gradient(135deg, var(--green), var(--green-deep));
  box-shadow: 0 6px 18px rgba(61, 220, 132, 0.35);
}
.ui-body { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.ui-search {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--ink-dim);
  font-size: 13px;
}
.ui-rows { display: flex; flex-direction: column; gap: 7px; }
.ui-row {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.07);
  font-size: 13.5px;
  font-weight: 600;
  transition: 0.25s;
}
.ui-row:hover { background: rgba(255, 255, 255, 0.1); transform: translateX(4px); }
.ui-row-ic {
  width: 26px; height: 26px;
  display: grid; place-items: center;
  border-radius: 8px;
  flex: none;
}
.c-green { background: rgba(61,220,132,.16); color: var(--green); }
.c-blue { background: rgba(96,165,250,.16); color: var(--blue); }
.c-orange { background: rgba(251,146,60,.16); color: var(--orange); }
.c-purple { background: rgba(192,132,252,.16); color: var(--purple); }
.c-cyan { background: rgba(103,232,249,.16); color: var(--cyan); }
.c-pink { background: rgba(244,114,182,.16); color: var(--pink); }
.c-rainbow { background: linear-gradient(135deg, rgba(61,220,132,.25), rgba(192,132,252,.25), rgba(96,165,250,.25)); color: #fff; }

/* UI 开关（还原工具内开关样式） */
.ui-switch {
  margin-left: auto;
  width: 34px; height: 19px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.18);
  position: relative;
  flex: none;
  transition: background 0.3s;
}
.ui-switch::after {
  content: "";
  position: absolute;
  top: 2px; left: 2px;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.3s;
}
.ui-switch.on { background: linear-gradient(120deg, var(--green), var(--green-deep)); border-color: transparent; }
.ui-switch.on::after { transform: translateX(15px); }

.ui-card {
  display: flex; align-items: center; gap: 12px;
  padding: 10px;
  border-radius: 14px;
  background: linear-gradient(120deg, rgba(61,220,132,.14), rgba(96,165,250,.14));
  border: 1px solid rgba(61, 220, 132, 0.25);
}
.ui-card-media {
  width: 64px; height: 48px;
  border-radius: 10px;
  flex: none;
  background:
    linear-gradient(160deg, rgba(255,255,255,.14), rgba(255,255,255,.02)),
    url("../assets/shot-home.jpg") center / cover;
  position: relative;
  overflow: hidden;
}
.ui-card-tag {
  position: absolute; left: 4px; bottom: 4px;
  font-size: 9px; font-weight: 800;
  padding: 2px 6px; border-radius: 6px;
  background: rgba(7,13,10,.7);
  color: var(--green);
  letter-spacing: 0.5px;
}
.ui-card-info { display: flex; flex-direction: column; min-width: 0; }
.ui-card-info b { font-size: 13px; }
.ui-card-info small { font-size: 11px; color: var(--ink-dim); }
.ui-glow {
  position: absolute; inset: -40% -20% auto -20%; height: 70%;
  background: radial-gradient(50% 60% at 50% 0%, rgba(61,220,132,.22), transparent 70%);
  pointer-events: none;
  border-radius: 50%;
}
.hero-ui-shadow {
  width: 70%; height: 40px;
  margin: 26px auto 0;
  background: radial-gradient(50% 50% at 50% 50%, rgba(61,220,132,.16), transparent 70%);
  filter: blur(6px);
}

.hero-scroll {
  position: absolute; left: 50%; bottom: 26px;
  translate: -50% 0;
  z-index: 3;
  width: 26px; height: 42px;
  border: 2px solid var(--ink-dim);
  border-radius: 999px;
  display: flex; justify-content: center;
  opacity: 0.7;
  transition: opacity .3s;
}
.hero-scroll:hover { opacity: 1; }
.hero-scroll span {
  width: 4px; height: 9px;
  margin-top: 7px;
  border-radius: 4px;
  background: var(--green);
  animation: scrollDot 1.8s infinite;
}
@keyframes scrollDot {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(12px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ---------- 跑马灯 ---------- */
.marquee {
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: rgba(61, 220, 132, 0.05);
  padding: 14px 0;
  position: relative;
  z-index: 2;
}
.marquee-track { display: flex; width: max-content; animation: marquee 26s linear infinite; will-change: transform; }
.marquee-track span {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--ink-dim);
  white-space: nowrap;
  padding-right: 12px;
}
.marquee-track i { font-style: normal; color: var(--green); padding: 0 14px; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- 通用 Section ---------- */
.section { padding: 110px 0; position: relative; }
.section-alt {
  background:
    radial-gradient(60% 40% at 85% 10%, rgba(96,165,250,.07), transparent 60%),
    radial-gradient(50% 40% at 10% 90%, rgba(61,220,132,.06), transparent 60%),
    var(--bg-2);
  border-block: 1px solid var(--line);
}

.section-head { text-align: center; max-width: 720px; margin: 0 auto 60px; }
.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 4px;
  color: var(--green);
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid rgba(61, 220, 132, 0.35);
  background: rgba(61, 220, 132, 0.08);
  margin-bottom: 18px;
  text-transform: uppercase;
}
.section-tag.light { color: #04120a; background: var(--green); border-color: var(--green); }
.section-head h2 { font-size: clamp(30px, 4vw, 44px); font-weight: 900; letter-spacing: 2px; }
.section-head p { color: var(--ink-dim); margin-top: 12px; font-size: 15.5px; }

/* ---------- 特性卡片 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.feature-card {
  padding: 34px 28px;
  transition: transform 0.35s, border-color 0.35s, background 0.35s;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute; inset: auto auto -60% -20%;
  width: 70%; aspect-ratio: 1;
  background: radial-gradient(closest-side, rgba(61,220,132,.14), transparent 70%);
  transition: opacity 0.4s;
  opacity: 0;
}
.feature-card:hover { transform: translateY(-8px); border-color: rgba(61, 220, 132, 0.45); background: var(--glass-strong); }
.feature-card:hover::before { opacity: 1; }
.feature-ic {
  width: 58px; height: 58px;
  display: grid; place-items: center;
  border-radius: 16px;
  margin-bottom: 20px;
}
.ic-green { background: rgba(61,220,132,.14); color: var(--green); }
.ic-blue { background: rgba(96,165,250,.14); color: var(--blue); }
.ic-orange { background: rgba(251,146,60,.14); color: var(--orange); }
.ic-purple { background: rgba(192,132,252,.14); color: var(--purple); }
.feature-card h3 { font-size: 20px; font-weight: 800; margin-bottom: 10px; letter-spacing: 1px; }
.feature-card p { font-size: 14px; color: var(--ink-dim); }

.quote-band {
  margin-top: 26px;
  padding: 44px 30px;
  text-align: center;
  background:
    linear-gradient(120deg, rgba(61,220,132,.1), rgba(96,165,250,.08)),
    var(--glass);
  border-color: rgba(61, 220, 132, 0.3);
}
.quote-main {
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 900;
  letter-spacing: 1px;
  background: linear-gradient(100deg, #fff, var(--green) 60%, var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.quote-sub { color: var(--ink-dim); margin-top: 10px; font-size: 14.5px; letter-spacing: 1px; }

/* ---------- 系统展示 ---------- */
.systems-wrap {
  display: grid;
  grid-template-columns: 240px 1fr;
  overflow: hidden;
  padding: 0;
}
.systems-side {
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-right: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}
.sys-tab {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 14px;
  border-radius: 14px;
  text-align: left;
  color: var(--ink-dim);
  transition: 0.3s;
  border: 1px solid transparent;
}
.sys-tab b { display: block; font-size: 15px; letter-spacing: 1px; }
.sys-tab small { font-size: 10.5px; letter-spacing: 1.5px; text-transform: uppercase; opacity: 0.7; }
.sys-tab:hover { background: var(--glass); color: var(--ink); }
.sys-tab.active {
  background: linear-gradient(120deg, rgba(61,220,132,.16), rgba(96,165,250,.1));
  border-color: rgba(61, 220, 132, 0.4);
  color: var(--ink);
  box-shadow: inset 0 0 0 1px rgba(61,220,132,.08), 0 8px 24px rgba(0,0,0,.25);
}
.sys-ic {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border-radius: 10px;
  flex: none;
}

.sys-panels { padding: 34px 36px; min-height: 420px; position: relative; }
.sys-panel { display: none; animation: panelIn 0.45s cubic-bezier(0.2, 0.8, 0.2, 1); }
.sys-panel.active { display: block; }
@keyframes panelIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}
.sys-panel-head { margin-bottom: 26px; }
.sys-panel-head h3 { font-size: 26px; font-weight: 900; letter-spacing: 2px; }
.sys-panel-head p { color: var(--ink-dim); font-size: 14px; margin-top: 4px; }
.sys-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.sys-item {
  display: flex; align-items: center; gap: 14px;
  padding: 15px 18px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: 0.3s;
}
.sys-item:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(61, 220, 132, 0.35);
  transform: translateY(-3px);
}
.sys-item-ic {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 12px;
  font-size: 20px;
  flex: none;
}
.sys-item b { display: block; font-size: 15px; letter-spacing: 0.5px; }
.sys-item small { font-size: 12px; color: var(--ink-dim); }

/* ---------- 皮肤专区 ---------- */
.skins-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
}
.skins-card { overflow: hidden; transition: transform 0.35s, border-color 0.35s; }
.skins-card:hover { transform: translateY(-8px); border-color: rgba(61, 220, 132, 0.4); }
.skins-media { position: relative; aspect-ratio: 16 / 8.4; overflow: hidden; }
.skins-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.skins-card:hover .skins-media img { transform: scale(1.07); }
.skins-media-tag {
  position: absolute; left: 16px; top: 16px;
  font-size: 12.5px; font-weight: 800;
  letter-spacing: 1.5px;
  padding: 6px 14px;
  border-radius: 999px;
  color: #04120a;
  background: linear-gradient(120deg, var(--green), var(--cyan));
  box-shadow: 0 6px 18px rgba(61, 220, 132, 0.35);
}
.skins-info { padding: 28px 30px 32px; }
.skins-info h3 { font-size: 22px; font-weight: 900; letter-spacing: 1.5px; margin-bottom: 10px; }
.skins-info p { font-size: 14px; color: var(--ink-dim); margin-bottom: 16px; }
.skins-list { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.skins-list li {
  font-size: 12.5px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(61, 220, 132, 0.1);
  border: 1px solid rgba(61, 220, 132, 0.3);
  color: var(--green);
  font-weight: 600;
}

/* ---------- 画廊 ---------- */
.gallery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
.shot {
  overflow: hidden;
  cursor: zoom-in;
  position: relative;
  transition: transform 0.35s, border-color 0.35s, box-shadow 0.35s;
}
.shot:hover {
  transform: translateY(-6px);
  border-color: rgba(61, 220, 132, 0.5);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(61,220,132,.25);
}
.shot img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1); }
.shot:hover img { transform: scale(1.06); }
.shot figcaption {
  padding: 14px 18px;
  font-size: 13.5px;
  color: var(--ink-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}
.shot figcaption::before { content: "\25B8"; color: var(--green); }
.shot::after {
  content: "\1F50D";
  position: absolute; right: 14px; top: 14px;
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: rgba(7, 13, 10, 0.7);
  border: 1px solid var(--line);
  font-size: 14px;
  opacity: 0;
  transform: translateY(-6px);
  transition: 0.3s;
}
.shot:hover::after { opacity: 1; transform: none; }

/* ---------- 宣传横幅 ---------- */
.promo {
  position: relative;
  padding: 130px 0;
  text-align: center;
  overflow: hidden;
  background: url("../assets/shot-promo.jpg") center / cover no-repeat;
}
.promo-mask {
  position: absolute; inset: 0;
  background:
    radial-gradient(55% 55% at 50% 45%, rgba(7,13,10,0.42), rgba(7,13,10,0.94)),
    linear-gradient(180deg, var(--bg-2), rgba(7,13,10,0.4) 40%, var(--bg));
}
.promo-inner { position: relative; z-index: 2; }
.promo-inner h2 {
  font-size: clamp(44px, 6vw, 76px);
  font-weight: 900;
  letter-spacing: 4px;
  margin: 18px 0 26px;
  background: linear-gradient(100deg, #fff 20%, var(--green) 60%, var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.promo-line { font-size: clamp(17px, 2.2vw, 23px); font-weight: 700; letter-spacing: 1.5px; color: var(--ink); }
.promo-line + .promo-line { margin-top: 10px; }
.promo-line b { color: var(--cyan); }
.promo-strong { color: var(--green); margin: 22px 0 36px; }

/* ---------- 购买 ---------- */
.buy-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 26px;
  align-items: start;
}
.buy-card { padding: 36px 34px; position: relative; overflow: hidden; }
.buy-card::before {
  content: "";
  position: absolute; inset: -50% -30% auto auto; width: 60%; aspect-ratio: 1;
  background: radial-gradient(closest-side, rgba(61,220,132,.16), transparent 70%);
}
.buy-card-head { margin-bottom: 24px; position: relative; }
.buy-ver {
  font-size: 11.5px;
  letter-spacing: 2px;
  color: var(--green);
  border: 1px solid rgba(61, 220, 132, 0.35);
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(61, 220, 132, 0.08);
}
.buy-card-head h3 { font-size: 32px; font-weight: 900; letter-spacing: 3px; margin-top: 12px; }
.buy-list { list-style: none; display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; }
.buy-list li { display: flex; align-items: center; gap: 12px; font-size: 14.5px; color: var(--ink); }
.buy-list i {
  width: 22px; height: 22px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: rgba(61, 220, 132, 0.15);
  color: var(--green);
  font-style: normal;
  font-size: 12px;
  font-weight: 900;
  flex: none;
}
.buy-actions { display: flex; flex-direction: column; gap: 14px; }
.buy-tip {
  margin-top: 20px;
  font-size: 13px;
  color: var(--ink-dim);
  text-align: center;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}
.buy-copy-tip {
  margin-top: 12px;
  font-size: 12.5px;
  color: var(--ink-dim);
  text-align: center;
  transition: color 0.25s;
}
.buy-copy-tip.ok { color: var(--green); font-weight: 700; }

.buy-faq { padding: 36px 34px; }
.buy-faq h3 { font-size: 22px; font-weight: 900; letter-spacing: 2px; margin-bottom: 20px; }
.faq-item { padding: 16px 0; border-bottom: 1px solid var(--line); }
.faq-item:last-child { border-bottom: none; padding-bottom: 0; }
.faq-item b { display: block; font-size: 15px; margin-bottom: 6px; }
.faq-item b::before { content: "Q  "; color: var(--green); font-weight: 900; }
.faq-item p { font-size: 13.5px; color: var(--ink-dim); padding-left: 24px; }
.faq-link {
  color: var(--green);
  font-weight: 700;
  word-break: break-all;
  border-bottom: 1px dashed rgba(61, 220, 132, 0.5);
  transition: color 0.25s, border-color 0.25s;
}
.faq-link:hover { color: var(--cyan); border-color: var(--cyan); }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--line);
  background: var(--bg-2);
  padding: 60px 0 40px;
  text-align: center;
}
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 16px; }
.footer .brand { margin-bottom: 4px; }
.footer-slogan { color: var(--ink-dim); font-size: 14.5px; letter-spacing: 1px; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; }
.footer-links a {
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--ink-dim);
  transition: 0.25s;
}
.footer-links a:hover { color: var(--green); background: rgba(61, 220, 132, 0.08); }
.footer-copy { font-size: 12.5px; color: rgba(159, 180, 168, 0.6); max-width: 640px; }

/* ---------- 页脚免责声明 ---------- */
.footer-disclaimer {
  width: min(760px, 100%);
  padding: 20px 24px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed var(--line);
  text-align: left;
}
.footer-disclaimer > b {
  display: block;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--green);
  margin-bottom: 8px;
}
.footer-disclaimer p {
  font-size: 12.5px;
  line-height: 1.9;
  color: rgba(159, 180, 168, 0.75);
}
.footer-disclaimer p b { color: var(--ink); }

/* ---------- 免责声明弹窗 ---------- */
.disclaimer-mask {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: grid;
  place-items: center;
  padding: 5vw;
  background: rgba(3, 6, 5, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s;
}
.disclaimer-mask.open { opacity: 1; pointer-events: auto; }
.disclaimer-modal {
  width: min(560px, 100%);
  max-height: 86vh;
  overflow-y: auto;
  padding: 34px 36px;
  background: rgba(13, 22, 17, 0.94);
  border-color: rgba(61, 220, 132, 0.28);
  transform: translateY(28px) scale(0.96);
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.disclaimer-mask.open .disclaimer-modal { transform: none; }
.disclaimer-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}
.disclaimer-ic {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: rgba(61, 220, 132, 0.14);
  border: 1px solid rgba(61, 220, 132, 0.35);
  color: var(--green);
  font-size: 22px;
  font-weight: 900;
  flex: none;
}
.disclaimer-head h3 { font-size: 22px; font-weight: 900; letter-spacing: 3px; }
.dl-ic {
  background: rgba(192, 132, 252, 0.14);
  border-color: rgba(192, 132, 252, 0.35);
  color: var(--purple);
}
.disclaimer-body { font-size: 14px; color: var(--ink-dim); margin-bottom: 28px; }
.disclaimer-body > p { margin-bottom: 14px; color: var(--ink); font-weight: 600; }
.disclaimer-body ol {
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.disclaimer-body li { line-height: 1.75; }
.disclaimer-body b { color: var(--green); }
.disclaimer-actions { display: flex; gap: 14px; }
.disclaimer-actions .btn { flex: 1; }

/* 作者信息弹窗 */
.author-body { display: flex; flex-direction: column; gap: 12px; margin-bottom: 26px; }
.author-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: border-color 0.25s, background 0.25s;
}
.author-row:hover { border-color: rgba(61, 220, 132, 0.35); background: rgba(255, 255, 255, 0.07); }
.author-label { font-size: 13px; color: var(--ink-dim); font-weight: 700; letter-spacing: 1px; flex: none; }
.author-value { font-size: 15px; font-weight: 800; color: var(--ink); text-align: right; word-break: break-all; }
.author-qq { color: var(--green); letter-spacing: 1.5px; font-variant-numeric: tabular-nums; }
.author-num {
  color: var(--green);
  letter-spacing: 1.5px;
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  font-size: 15px;
  cursor: pointer;
  transition: color 0.25s;
}
.author-num:hover { color: var(--cyan); text-decoration: underline; }
.author-tip {
  margin: -8px 0 22px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(159, 180, 168, 0.7);
}
/* 复制提示 Toast */
.copy-toast {
  position: fixed;
  left: 50%;
  bottom: 96px;
  translate: -50% 20px;
  z-index: 350;
  padding: 12px 24px;
  border-radius: 999px;
  background: rgba(13, 22, 17, 0.92);
  border: 1px solid rgba(61, 220, 132, 0.4);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.5);
  color: var(--ink);
  font-size: 13.5px;
  font-weight: 600;
  backdrop-filter: blur(14px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, translate 0.3s;
  max-width: 86vw;
  text-align: center;
}
.copy-toast.show { opacity: 1; translate: -50% 0; }
.author-add {
  display: inline-flex;
  align-items: center;
  margin-left: 12px;
  padding: 5px 16px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1px;
  color: #04120a;
  background: linear-gradient(120deg, var(--green), var(--green-deep));
  box-shadow: 0 4px 14px rgba(61, 220, 132, 0.3);
  vertical-align: middle;
  transition: transform 0.25s, box-shadow 0.25s;
}
.author-add:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(61, 220, 132, 0.45); }

body.no-scroll { overflow: hidden; }

@media (max-width: 640px) {
  .disclaimer-modal { padding: 26px 22px; }
  .disclaimer-actions { flex-direction: column-reverse; }
}

/* ---------- 下载成功页 ---------- */
body.dl-page-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 40px 5vw;
  background:
    radial-gradient(50% 40% at 50% 0%, rgba(61, 220, 132, 0.12), transparent 60%),
    radial-gradient(40% 35% at 80% 90%, rgba(96, 165, 250, 0.08), transparent 60%),
    var(--bg);
}
.dl-page {
  width: min(560px, 100%);
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.dl-page .brand { justify-content: center; margin-bottom: 6px; }
.dl-success { padding: 44px 36px; text-align: center; }
.dl-success-ic {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  display: grid;
  place-items: center;
  border-radius: 22px;
  color: var(--green);
  background: rgba(61, 220, 132, 0.12);
  border: 1px solid rgba(61, 220, 132, 0.35);
  box-shadow: 0 0 40px rgba(61, 220, 132, 0.2);
}
.dl-success h1 {
  font-size: 30px;
  font-weight: 900;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.dl-success-file {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  margin-bottom: 16px;
}
.dl-success-file span { font-size: 12px; color: var(--ink-dim); font-weight: 400; }
.dl-success-tip { font-size: 13.5px; color: var(--ink-dim); margin-bottom: 24px; }
.dl-success-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }
.dl-notice { padding: 24px 28px; text-align: left; }
.dl-notice > b {
  display: block;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--green);
  margin-bottom: 10px;
}
.dl-notice ol {
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.dl-notice li { font-size: 12.5px; line-height: 1.8; color: var(--ink-dim); }
.dl-notice li b { color: var(--ink); }

@media (max-width: 640px) {
  .dl-success { padding: 34px 22px; }
  .dl-success-actions .btn { flex: 1; }
}

/* ---------- 背景音乐播放器 ---------- */
.music-player {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  display: flex;
  align-items: center;
  gap: 10px;
}
.music-name {
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(7, 13, 10, 0.72);
  border: 1px solid var(--line);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--ink-dim);
  white-space: nowrap;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  transition: color 0.3s, border-color 0.3s;
}
.music-player.playing .music-name {
  color: var(--green);
  border-color: rgba(61, 220, 132, 0.45);
}
.music-btn {
  position: relative;
  width: 54px;
  height: 54px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #04120a;
  background: linear-gradient(135deg, var(--green), var(--green-deep));
  box-shadow: 0 10px 30px rgba(61, 220, 132, 0.4);
  transition: transform 0.25s, box-shadow 0.25s;
}
.music-btn:hover { transform: scale(1.08); box-shadow: 0 14px 38px rgba(61, 220, 132, 0.55); }
.music-btn svg { position: relative; z-index: 1; }
/* 旋转唱片 */
.music-disc {
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, #0b1410 18%, transparent 19%),
    repeating-radial-gradient(circle at 50% 50%, rgba(7,13,10,.9) 0 2px, rgba(7,13,10,.55) 2px 4px);
  opacity: 0;
  transition: opacity 0.3s;
}
.music-player.playing .music-disc { opacity: 0.9; animation: discSpin 4s linear infinite; }
.music-player.playing .music-btn { color: var(--green); }
.music-player.playing .music-btn svg { filter: drop-shadow(0 0 6px rgba(61, 220, 132, 0.8)); }
@keyframes discSpin { to { transform: rotate(360deg); } }

/* 播放脉冲提示 */
.music-player.attention .music-btn { animation: musicPulse 1.6s ease-in-out infinite; }
@keyframes musicPulse {
  0%, 100% { box-shadow: 0 10px 30px rgba(61, 220, 132, 0.4), 0 0 0 0 rgba(61, 220, 132, 0.45); }
  50% { box-shadow: 0 10px 30px rgba(61, 220, 132, 0.4), 0 0 0 12px rgba(61, 220, 132, 0); }
}

@media (max-width: 640px) {
  .music-player { right: 16px; bottom: 16px; }
  .music-name { display: none; }
}

/* ---------- 灯箱 ---------- */
.lightbox {
  position: fixed; inset: 0;
  z-index: 200;
  display: grid; place-items: center;
  padding: 4vw;
  background: rgba(3, 6, 5, 0.88);
  backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s;
}
.lightbox.open { opacity: 1; pointer-events: auto; }
.lightbox img {
  max-width: 100%;
  max-height: 88vh;
  border-radius: 16px;
  border: 1px solid var(--line);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.7);
  transform: scale(0.94);
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lightbox.open img { transform: scale(1); }
.lightbox-close {
  position: absolute; top: 22px; right: 26px;
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 12px;
  font-size: 17px;
  color: var(--ink);
  background: var(--glass);
  border: 1px solid var(--line);
  transition: 0.25s;
}
.lightbox-close:hover { background: var(--glass-strong); transform: rotate(90deg); }

/* ---------- 滚动显现动画 ---------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity 0.8s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1); }
.reveal.visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.12s; }
.reveal[data-delay="2"] { transition-delay: 0.24s; }
.reveal[data-delay="3"] { transition-delay: 0.36s; }
.reveal[data-delay="4"] { transition-delay: 0.48s; }
.reveal[data-delay="5"] { transition-delay: 0.6s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 60px; }
  .hero-ui { max-width: 560px; margin: 0 auto; width: 100%; }
  .ui-mock { transform: none; animation: none; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .systems-wrap { grid-template-columns: 1fr; }
  .systems-side { flex-direction: row; overflow-x: auto; border-right: none; border-bottom: 1px solid var(--line); }
  .sys-tab { flex-direction: column; gap: 4px; text-align: center; flex: none; padding: 12px 18px; }
  .sys-tab small { display: none; }
  .sys-panels { padding: 28px 24px; }
  .skins-layout, .buy-grid, .gallery-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav-links {
    position: fixed;
    top: 68px; right: 0; left: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 18px 5vw 26px;
    background: rgba(7, 13, 10, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-130%);
    transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
  }
  .nav-links.open { transform: none; }
  .nav-links a { padding: 13px 16px; font-size: 16px; }
  .nav-links a.nav-cta { margin-left: 0; text-align: center; }
  .nav-burger { display: flex; }
  .section { padding: 80px 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .sys-items { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 8px; width: 100%; }
  .stat + .stat::before { display: none; }
  .hero-actions .btn { flex: 1; }
  .promo { padding: 90px 0; }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ============================================================
   低性能设备自动降级（由 JS 检测后给 <html> 添加 .perf-lite）
   仅关闭最耗性能的特效，UI 结构、图标、配色、布局完全不变
   ============================================================ */
/* 导航栏：滚动时内容在背后流动，模糊每帧重算 → 改用不透明背景（视觉几乎一致） */
html.perf-lite .nav.scrolled {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: rgba(7, 13, 10, 0.95);
}
/* 首屏：停止全屏背景缩放（每帧重绘大图）与漂浮装饰 */
html.perf-lite .hero-bg { animation: none; transform: scale(1.03); }
html.perf-lite .hero-blocks { display: none; }
html.perf-lite .ui-mock { animation: none; }
/* 首屏 UI 演示与徽章：背景已静止，模糊只计算一次，保留效果 */
html.perf-lite .hero-badge,
html.perf-lite .hero-stats,
html.perf-lite .ui-mock,
html.perf-lite .ui-rail { backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }